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# Copyright (C) 2009-2012 Lars Wirzenius
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import unittest
from cliapp import Hook, FilterHook
class HookTests(unittest.TestCase):
def setUp(self):
self.hook = Hook()
self.args = None
self.kwargs = None
def callback(self, *args, **kwargs):
self.args = args
self.kwargs = kwargs
def test_has_no_callbacks_by_default(self):
self.assertEqual(self.hook.callbacks, [])
def test_adds_callback(self):
self.hook.add_callback(self.callback)
self.assertEqual(self.hook.callbacks, [self.callback])
def test_adds_callback_only_once(self):
self.hook.add_callback(self.callback)
self.hook.add_callback(self.callback)
self.assertEqual(self.hook.callbacks, [self.callback])
def test_calls_callback(self):
self.hook.add_callback(self.callback)
self.hook.call_callbacks('bar', kwarg='foobar')
self.assertEqual(self.args, ('bar',))
self.assertEqual(self.kwargs, {'kwarg': 'foobar'})
def test_removes_callback(self):
cb_id = self.hook.add_callback(self.callback)
self.hook.remove_callback(cb_id)
self.assertEqual(self.hook.callbacks, [])
class FilterHookTests(unittest.TestCase):
def setUp(self):
self.hook = FilterHook()
self.args = None
self.kwargs = None
def callback(self, data, *args, **kwargs):
self.args = args
self.kwargs = kwargs
return data + ['callback']
def test_returns_argument_if_no_callbacks(self):
self.assertEqual(self.hook.call_callbacks(['foo']), ['foo'])
def test_calls_callback_and_returns_modified_data(self):
self.hook.add_callback(self.callback)
data = self.hook.call_callbacks([])
self.assertEqual(data, ['callback'])
def test_calls_callback_with_extra_args(self):
self.hook.add_callback(self.callback)
self.hook.call_callbacks(['data'], 'extra', kwextra='kwextra')
self.assertEqual(self.args, ('extra',))
self.assertEqual(self.kwargs, {'kwextra': 'kwextra'})
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